Bobbin



LMQQS@ W. BOURASSA. BoBBlN. FLLED MAY 13. 192].

Jan. 2, w23.

Patented dan. 2, i923.

WILLIAM vBoUrtAssri, or Lnwrs'ron, MAINE.

BOBBIN.

Application tiled May 13,

The shuttle is usually supplied at one end with a pair of spring jawshaving opposing perpendicular recesses and the base of the bobbin isprovided with annular rings which snap into said opposing recesses whenthe head of the bobbin is forced between said aws from the top or thebottom.

These jaws are made exceedinglyv strong and stid Iand they hold the baseof the bobbin with a heavy tension.

When the bobbin`is struck from the shuttle by va blow on the body of theshank from on top, the rings of the base are twisted in the opposingrecesses of the jaw, separating the jaws slightly and forcing the bobbinbodily downward through the open bottom of the shuttle.

The annular rings which are usually o-f hardened nfietal7 are applied tothe base of the shuttle in various ways, the bobbin now in most commonuse having these annular rings applied as independent rings open at onepoint, expanded and allowed to contract into annular grooves on thewooden head of the bobbin.

The object of my invention is to apply these annular metal rings to thehead of the bobbin in such a manner that they will resist the very greatstrain which comes from striking the bobbin from the shuttle and thetwist put on the rings, with the tendency also to slip from the end ofthe head.

According to my invention, l form the annular ribs integral with aferrule, the internal surface of the ferrule being provided with screwthreads or projections which embedding themselves in the substance ofthe wood hold the ferrule from sliding in either direction and fastensit rmly on the head 1921. Serial No. 469,117.

of the'bobbin. The ferrule is further secured in place by abuttingagainst an annular projection formed on the end of the f' place afterbeing passed over the point and thence onto the head and thus forcedinto contact with the annular projection.

A specially strong construction may be made by screwing the ferrule intoplace so that the threads of the ferrule will out into the body of thewood without rupturing the wood, as it would be if driven on.

I have illustrated my invention in the accompanying drawing in whichFig. l is a half longitudinal section and half elevation of the spindle.

Fig. 2 is a side elevation of the ferrule with a portion out away and,

Fig. 3 is an end elevation of the ferrule.

Referring to the drawing, the body of the bobbin is preferablyconstructed of wood with a shank 1 and an enlarged head 2 having theusual form.

At the base of the head 2 is formed an annular projection 3 making ashoulder 4 on the side next to the body of the s indle.

The annular ribs 5 which are as s own three in number are formedintegral on the outer surface of a ferrule 6 having an internal screwthread cut in it. A slight taper is given to the head of the bobbin andto the body of the ferrule so that the ferrule may be screwed onto thehead by a rotary motion or pressed or hammered on as desired.

' One end of the head comes in conta-ct with a shoulder 4f, thuspreventing the ferrule from moving in that direction and holding itfirmly in place.

Instead of a screw thread projections may be made of any suitable formwhich will embed themselves in the body of the wood so as to secure theferrule against turning on the wooden head or against a longitudinalmovement toward the point.

A bobbin constructed in this manner will wear for a long time, the ribswill remain firmly in place, there will be no chance for the yarn tocatch as in the split ring bobbin.

I claim:

A hobbin for automatic 100m shuttles including ahollcw tube WithaSubstantially cylindrical base, sad'basebe'ing enlergedto form anannular shoulder,1 an integral cylin- @rival {"errule arranged on andttng said base adjacent. t0- svad shoulder and providei en its interiorSurface with screw threads embedded in seid. besea the outer Surface ofsaid `lccerrule bengrprovided with @plurality of annular ribs.

WILLIAM BOURASSA.

